2-Decarboxy-2-alkylcarbonyl-3,7-inter-m-phenylene-3-oxa-4,5,6-trinor-11-deoxy-PGE1 compounds

ABSTRACT

The present invention provides novel prostaglandin analogs wherein the C-2 carboxyl is replaced by alkylcarbonyl, i.e., a C-2 ketone. These novel 2-decarboxy-2-alkylcarbonyl-PG-type compounds are disclosed as improved gastrointestinal cytoprotective agents, being devoid or substantially devoid of other prostaglandin-type effects (e.g., smooth muscle or cardiovascular).

The present application is a divisional application of Ser. No. 888,695, filed Mar. 21, 1978, now Patent No. 4,123,463.

The present invention relates to prostaglandin analogs, for whcih the essential material constituting disclosure therefor is incorporated by reference here from U.S. Pat. No. 4,123,463. 

I claim:
 1. A prostaglandin analog of the formula ##STR1## wherein R₁ is alkyl of one to 4 carbon atoms, inclusive; wherein L₁ is ##STR2## wherein R₃ and R₄ are hydrogen, methyl, or fluoro, being the same or different, with the proviso that one of R₃ and R₄ is methyl only when the other is hydrogen or methyl;Wherein M₁ is ##STR3## wherein R₅ is hydrogen or methyl; WHEREIN R₇ is ##STR4## WHEREIN H IS ZERO TO THREE, INCLUSIVE, WHEREIN M IS ONE TO 5, INCLUSIVE, S IS ZERO, ONE, 2, OR 3 AND T is chloro, fluoro, trifluoromethyl, alkyl of one to 3 carbon atoms, or alkoxy of one to 3 carbon atoms, the various T's being the same or different, with the proviso that not more than two T's are other than alkyl; Wherein Y₁ is (1) trans-CH═CH-- (2) cis-CH═CH-- (3) --ch₂ ch₂ --, or (4) --C|C--; and wherein Z₁ is ##STR5## WHEREIN G IS ONE, TWO OR THREE.
 2. A prostaglandin analog according to claim 1, wherein R₁ is methyl.
 3. A prostaglandin analog according to claim 2, wherein is ##STR6##
 4. 2-Decarboxy-2-methylcarbonyl-3,7-inter-m-phenylene-3-oxa-4,5,6-trinor-11-deoxy-8β, 12α-PGE₂, a prostaglandin analog according to claim
 3. 5. A prostaglandin analog according to claim 2, wherein is ##STR7##
 6. A prostaglandin analog according to claim 5, wherein Y₁ is cis-CH═CH-.
 7. 2-Decarboxy-2-methylcarbonyl-3,7-inter-m-phenylene-3-oxa-4,5,6-trinor-13-cis-11-deoxy-PGE₁, a prostaglandin analog according to claim
 6. 8. A prostaglandin analog according to claim 5, wherein Y₁ is --CH₂ CH₂ -.
 9. 2-Decarboxy-2-methylcarbonyl-3,7-inter-m-phenylene-3-oxa-4,5,6-trinor-11-deoxy-PGE₁, a prostaglandin analog according to claim
 8. 10. A prostaglandin analog according to claim 5, wherein Y₁ is -C.tbd.C-.
 11. 2-Decarboxy-2-methylcarbonyl-3,7-inter-m-phenylene-3-oxa-4,5,6-trinor-13,14-didehydro-11-deoxy-PGE₁, a prostaglandin analog according to claim
 10. 12. A prostaglandin analog according to claim 5, wherein Y₁ is trans-CH.tbd.CH-.
 13. A prostaglandin analog according to claim 12, wherein R₇ is ##STR8##
 14. 2-Decarboxy-2-methylcarbonyl-3,7-inter-m-phenylene-3-oxa-4,5,6,18,19,20-hexanor-17-phenyl-11-deoxy-PGE₁, a prostaglandin analog according to claim
 13. 15. A prostaglandin analog according to claim 12, wherein R₇ is ##STR9##
 16. 2-Decarboxy-2-methylcarbonyl-3,7-inter-m-phenylene-3-oxa-4,5,6,17,18,-19,20-heptanor-16-phenoxy-11-deoxy-PGE₁, a prostaglandin analog according to claim
 15. 17. A prostaglandin analog according to claim 12, wherein R₇ is -(CH₂)_(m) -CH₃ -.
 18. A prostaglandin analog according to claim 17, wherein Z₁ is ##STR10##
 19. 2-Decarboxy-2-methylcarbonyl-3,7-inter-m-phenylene-4,5,6-trinor-11-deoxy-PGE₁, a prostaglandin analog according to claim
 18. 20. A prostaglandin analog according to claim 17, wherein Z₁ is ##STR11##
 21. A prostaglandin analog according to claim 17, wherein R₅ is methyl.
 22. 2-Decarboxy-2-methylcarbonyl-3,7-inter-m-phenylene-3-oxa-4,5,6-trinor-15-methyl-11-deoxy-PGE₁, a prostaglandin analog according to claim
 17. 23. A prostaglandin analog according to claim 17, wherein R₅ is hydrogen.
 24. A prostaglandin analog according to claim 23, wherein one of R₃ and R₄ is fluoro.
 25. 2-Decarboxy-2-methylcarbonyl-3,7-inter-m-phenylene-3-oxa-4,5,6-trinor-16,16-difluoro-11-deoxy-PGE₁, a prostaglandin analog according to claim
 24. 26. A prostaglandin analog according to claim 23, wherein at least one of R₃ and R₄ is methyl.
 27. 2-Decarboxy-2-methylcarbonyl-3,7-inter-m-phenylene-3-oxa-4,5,6-trinor-16,16-dimethyl-11-deoxy-PGE.sub.1, a prostaglandin analog according to claim
 26. 28. A prostaglandin analog according to claim 23, wherein R₃ and R₄ are both hydrogen.
 29. 2-Decarboxy-2-methylcarbonyl-3,7-inter-m-phenylene-3-oxa-4,5,6-trinor-11-deoxy-PGE₁, a prostaglandin analog according to claim
 28. 